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| author |   Dave Hansen <haveblue@us.ibm.com> | 2006-09-30 23:29:02 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-01 00:39:30 -0700 |
| commit | aab520e2f6c80160cabd187a8d0292d1cec8ff68 (patch) | |
| tree | e066da750f4aba3e5b472a2fafd5d267876420e2 /fs/namei.c | |
| parent | [PATCH] r/o bind mounts: prepare for write access checks: collapse if() (diff) | |
| download | linux-dev-aab520e2f6c80160cabd187a8d0292d1cec8ff68.tar.xz linux-dev-aab520e2f6c80160cabd187a8d0292d1cec8ff68.zip | |
[PATCH] r/o bind mount prepwork: move open_namei()'s vfs_create()
The code around vfs_create() in open_namei() is getting a bit too complex.
Right now, there is at least the reference count on the dentry, and the
i_mutex to worry about. Soon, we'll also have mnt_writecount.
So, break the vfs_create() call out of open_namei(), and into a helper
function. This duplicates the call to may_open(), but that isn't such a bad
thing since the arguments (acc_mode and flag) were being heavily massaged
anyway.
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/fs/namei.c b/fs/namei.c index 7bdceedd254c..28d49b301d55 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1595,6 +1595,24 @@ int may_open(struct nameidata *nd, int acc_mode, int flag) return 0; } +static int open_namei_create(struct nameidata *nd, struct path *path, + int flag, int mode) +{ + int error; + struct dentry *dir = nd->dentry; + + if (!IS_POSIXACL(dir->d_inode)) + mode &= ~current->fs->umask; + error = vfs_create(dir->d_inode, path->dentry, mode, nd); + mutex_unlock(&dir->d_inode->i_mutex); + dput(nd->dentry); + nd->dentry = path->dentry; + if (error) + return error; + /* Don't check for write permission, don't truncate */ + return may_open(nd, 0, flag & ~O_TRUNC); +} + /* * open_namei() * @@ -1676,18 +1694,10 @@ do_last: /* Negative dentry, just create the file */ if (!path.dentry->d_inode) { - if (!IS_POSIXACL(dir->d_inode)) - mode &= ~current->fs->umask; - error = vfs_create(dir->d_inode, path.dentry, mode, nd); - mutex_unlock(&dir->d_inode->i_mutex); - dput(nd->dentry); - nd->dentry = path.dentry; + error = open_namei_create(nd, &path, flag, mode); if (error) goto exit; - /* Don't check for write permission, don't truncate */ - acc_mode = 0; - flag &= ~O_TRUNC; - goto ok; + return 0; } /* |